Title :
A rapid and simple method for parallel the TiO2 nanowires and the aligned-substrate surface: Characterization of nanowires
Author :
Chu, Yung-Ming ; Lin, Chi-Chang ; Wu, Jih-Jen ; Chang, Hsien-Chang
Author_Institution :
Inst. of Biomed. Eng., Nat. Cheng Kung Univ., Tainan
Abstract :
The purpose of this research is to develop an easy and rapid method to align and parallel nanowires on the patterned-substrates for the application of TiO2 nanowires field effect transistors (NWFET) biosensors. Titanic oxide nanowires, which the average diameter and length of prepared nanowires are about 20 to 30 nm and 3 mum, respectively, is made base on the simple hydrothermal synthesis method. The energy band gap of the TiO2 at anatase structure is about 3.33 eV. The vibration and stretching of the specific functional groups are presented at wavenumber 395, 514 and 638 cm-1 under Raman spectroscopy measurement. The homemade robot system is designed to pull the substrate up from hydrogen titanate solution. Paralled-TiO2 nanowires are formed via gravity effect and the channel alignment on the substrate surface. In this paper, the key factors such as robot speed, channel structures and nanowire concentration are studied and discussed. The assembly method of the devices and the modification of the nanowires are also mentioned in final.
Keywords :
Raman spectroscopy; band structure; biosensors; field effect transistors; nanowires; titanium compounds; Raman spectroscopy measurement; TiO2; aligned nanowires; aligned substrate surface; anatase structure; assembly method; channel alignment; energy band gap; gravity effect; homemade robot system; hydrothermal synthesis; nanowire modification; nanowires field effect transistors biosensors; parallel nanowires; patterned substrates; Biosensors; FETs; Hydrogen; Nanowires; Photonic band gap; Raman scattering; Robots; Spectroscopy; Titanium compounds; Vibration measurement;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems, 2008. NEMS 2008. 3rd IEEE International Conference on
Conference_Location :
Sanya
Print_ISBN :
978-1-4244-1907-4
Electronic_ISBN :
978-1-4244-1908-1
DOI :
10.1109/NEMS.2008.4484396